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Fossils and prehistoric marine life, Ordovician Period

Brian Etkin

Created on December 1, 2025

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Fossils and prehistoric marine life, Ordovician Period

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Cephalopod (Cameroceras)

Cephalopod

Cephalopod (Endoceras)

Cephalopod (Cameroceras) — Cameroceras ("chambered horn") is an extinct genus of endocerid cephalopod which lived in equatorial oceans during the entire Ordovician period.

Cephalopod (Endoceras) Endoceras is an extinct genus of large, straight shelled cephalopods that lived in the Ordovician period.

Honeycomb Coral (Paleofavosites)

Honeycomb Coral (Paleofavosites)

Chain Coral (Catenipora)

Chain Coral (Catenipora) is an extinct genus of tabulate corals in the family Halysitidae, known from the Ordovician to the Silurian.

Favosites is an extinct genus of tabulate coral characterized by polygonal closely packed corallites (giving it the common name "honeycomb coral").

Who does this Geologist look like?

Who does this Geologist look like?

Brachiopod

Brachiopod

Hundreds of them, whole and fragmented. Brachiopods have been around since the Cambrian (~550 million years ago) and were among the first animal groups to diversify on Earth.

Taylor Swift.

Brachiopods

Brachiopods

Worm Tunnels

Worm Tunnels

Intact/whole pieces. Brachiopods, phylum Brachiopoda, are a phylum of animals that have hard "valves" (shells) on the upper and lower surfaces.

-500-million-year-old worm 'superhighway' evidence that life was active in an environment thought uninhabitable.

Honeycomb Coral (Paleofavosites)

Honeycomb Coral (Paleofavosites)

Ammonite

Brain Coral

Brain Coral

Ammonite are extinct, (typically) coiled-shelled cephalopods comprising the subclass Ammonoidea. They are more closely related to living octopuses snd squid.

Brain Coral is a common name given to various corals in the families Mussidae and Merulinidae, so called due to their generally spheroid shape and grooved surface which resembles a brain

Ammonite

Favosites is an extinct genus of tabulate coral characterized by polygonal closely packed corallites (giving it the common name "honeycomb coral"